I got a little crazy with a couple of my corvette buddies testing our cars with the GTech pro. Yes, I am a corvette owner with 400 RWHP but I also own a 1998 M3 and I am trying to modify it too. I came and curiosity got the best of me. I had to try it on the M3. Now when I first got the GTech, I measured 219 RWH and thought it was incorrect. I went out last night and made a couple of passes and they avg about 230 RWH. I'm starting to believe this silly thing. All my measurements of other cars has been extremely accurate. I'm so surprised that I'm seeing these numbers from a stock 98 M3. Has anyone else seen sim results?